Tire boot



E. M, SHELL. TIRE BOOT.

APPLICATION F|LED-IUNE 5. i919.

1,407,305, Patented Feb. 21,1922.

miren stares .ear enr e rUiaiNGcoMrAivY, or seein/ina, wnsnigneroiv.

. trier. Boor.

To all 'whom t may concern.' v

Beit known that 1I, EDGAR M. Sinnen., a citizen of the United States, residing at Spokane, inSpolane County and State of Vashington, have invented certain fnewi and useful Improvements in lTire -l3o'ots,of which the following is a specification. f

rlfhe present invention relates to ain-im# proved tire boot designed 4'for use iniconnee 'tion with pneumatic wheel tires for closing a fractu-re'or cutgin the outer casing of the tire, the boot to be inser'tedbe'tween the fractured casing andthe -vinner tube `of the tire as usual.

The primary/'purpose 'and objective ofthe' inventionis the provision 'of a boot that will be effective in holding close the edges of a fractured casing, especially while pressure is being brought into the tire by inflation, so`

that the fractured tire, when repaired will have the edges of the fracture or cut, in close proximity and the boot will hold the, parts permanently in this position, distributing the strain over the entire area of the boot so that no one portion of the boot will be subject to excessive strain or distortion. Where the boot is used in connection with a hole in the outer casing, provision is'made so that the boot will bridge or be stretched taut over the hole and be prevented from bulging out' into the hole, and this is accomplished by the utilization of numerous spurs distributed over the entire area of the boot in order that not only may the materialof the casing be strengthened and reinforced in proximity to the hole therein, but Vthe support accorded the boot at all points surrounding the hole or opening in the casing, prevents the boot being forced into the hole, or in other words prevents bulging of the boot in the hole. By holding the walls of the fracture or opening as described, the boot prevents the casing from bulging at the point of fracture and holds the casing to the same diameteiand size.

Numerous other advantages will appear hereinafter as the invention is specifically described, and attention is called to the drawings wherein one specific form of the invention is illustrated, the partsbeing combined and arranged according to the best mode so far devised for the practical application of the principles of the invention.

Figure l is a view in side elevation of the Vboot, in its'normal speciec'auonof remerciement. @mimi-,ed Feb. 2L '1g-21g, Application Amed June V,

191e. serial No. 301,874.

pOStion assumed when lnplace'in a tire. l A,

Ene-.AR in, srnieni, or stone-iin, wns-riinsron, Assistme'. 'ro ronciriivnivieivurec- Figure 2 is `a transverse view of la tire `of -j usual construction with thej boot fin place.

Figure 3 shows fone ofthe headed spurs that are employed between the layers `of thev boot.

In order that the invention may be 'readily Y understood I have utilized fthe yusual form of pneumatic Wheel tire including'fthe inner :tube l and the outer casingQ having'the side ywallsB and flanges 4 retained in the ri'ni or felly 5, the boot, as a wholebeing indicated by the numeral 6 and designed to vbe inserted between the outercasin'g and the 'inner tube of the tire in orde'rto close` afracturedopening Aor a cut in the outer casing.

The boot is made up of a pair ofv flexible i layers of fabric as 7 and 8 indicating" the outer and inner layers respectively. These layers may be of canvas or other fabric and are exible and they are vulcanized oncemented together, and provide a iiexible boot, adapted to conform `to the shape or contour of the tire with which they areto be utilized. Y

interspersed over the whole area of the boot are numerous spurs 9 that project 1 through the outer designed to enter the inner wall Vof the outer casing of the tire when the boot is used. Each of these spurs is' fashioned with a broad flat head l() of sufficient thinness tobe encased be-V tween the layers of the boot, yet-of sufiicicnt strength to form a rigid foundation forth layer of the boot and are Spur, so that the latter'willl always stand inn l radial position to the boot. Thus the entire area .of the boot is provided with spurs,

spaced the required distanceapart, and pro-y vided with rigid and iiini bases or heads so that when the flexible boot adapts itself to f the contour of the tire to be mended. the numerous spurs radiate in the proper directions from the circumferential axis'of'tlie tire as acenter, and enter the casingof the tire as understood'.

The heads of the spurs are cemented and encased between the twovlayers of the boot,

and to further firmly anchor the heads, they may be yprovided with 'openingsl 1l and periplieral lugs l2 so that .the cement or vul- Y canizing material may pass through these openings and form connections between the two layers of fabric, and the lugs 12 may` 'form means for Vcloser cementing of the la'y-l ers about these lugs to hold the heads more firmly and rigidly between their layers or retainingfabrics, The flow of the cement through the openings in the head and around the lugs on the periphery of the head, enhance the bindingv effect of the cement and fix the heads against displacementor tipping sidewise.. Wl hen a tire 1s to be mended, the adjoining Walls of the fractured tire are cleaned and allowed to lie in close contact due to the resiliency or elasticity of the casing material, and when the boot is applied, the fractured place is substantially closed by the elastic strength of the casing'. Now when the boot is made effective by the introduction of air pressure back of it in the tire, before the fractured Walls can be` separated by the pres sure, the numerous Yspurs engage the inner Walls of the casing and hold the casing, and as the pressure increases the spurs are forced into the casing and the edges'of the fracture are still held in their original closed position, due to the presence of the numerous spurs surrounding on all sides the fracture. Thus the fracture is reinforced and held closed against the entrance of pebbles dirt ctc. that would tear the easing and inner tube, and

,Les

furthermore the numerous spurs anchor their surrounding areaof boot so that movement of the fabric of the boot is prevented .and friction thus eliminated. And, as Vbefore stated the tire casing is maintained inits normal shape and size and undue or excessive strain upon a Weak portion ofY the tire is eliminated, for, as a matter of fact, the reinforcingeifect of the boot renders the fracture portion of the tire as strong in resisting pressure as the unfractured part of the tire.

What l claim is` s The combination with a fractured tire casing, of a reinforcing boot conforming to the contour of the tire and comprising' outer and inner layers of flexible material and an intermediate cenienting medium, ofa multiplicity of flat heads interspersed over the Whole areabetween the layers and provided with openings and lugs as described to enhance the binding effect of the cement, and

said heads provided With-radiating spur-sextending transversely through the outer layer of the boot and piercing the inner YWall of the outer casing of the tire. Y Y s In testimony whereof l affix my signature.

Ensae M. srnnLL. 

